diff --git a/rowers/models.py b/rowers/models.py
index 5eb8ffa8..638c69eb 100644
--- a/rowers/models.py
+++ b/rowers/models.py
@@ -6,6 +6,7 @@ from __future__ import unicode_literals, absolute_import
 
 from django.utils.encoding import python_2_unicode_compatible
 
+from django.db import models,IntegrityError
 from django.contrib.auth.models import User
 from django.core.validators import validate_email
 from django.core.exceptions import ValidationError